The second marks the arrival of transverse vibrations which travel more slowly and arrive several minutes after the first.

然后记录下的是横向波的到达，横向波比纵向波传播得慢，在纵向波到过几分钟后能到达。

Stunned is the only word I can think of to describe my feelings when I saw those second bite marks on the tail.

我看到尾巴上那第二组咬痕时，只有震惊两字能形容我的心情。